On Sunday, authorities temporarily halted the search of Lizzi Marriott's body in the waters around Peirce Island in Portsmouth. The area is known for its strong tides.

"We recognize those waters are challenging and will have further coordination to determine what the next viable steps are," said associate attorney general Jane Young.

Young said the attorney general's office would be coordinating with other agencies to continue the search.

Marriott's body has not been found, but police have confirmed that she is dead.

Authorities were originally searching in the area around Peirce Island but the island has since reopened to the public. Crime scene tape at a Dover apartment building connected with the case has also been removed.

Authorities have taken 29-year-old Seth Mazzaglia into custody and charged him with second-degree murder. He will be arraigned on Monday at Dover District Court.

Mazzaglia is an actor and has a black belt in karate.

Paige Murdock has known Mazzaglia for the past 18 months. She said Mazzaglia was a karate instructor to her three daughters -- teaching them at the rec center in Kittery, Maine.

“It’s very numbing,” Murdock said. “I don’t think it’s digested yet. You know you’re almost numb to it. You don’t believe something like this could happen that close to home.”

Murdock and her husband, Shawn, said “Sensei Seth,” as they called him, was always polite, confident and friendly.

Police said Marriott's car was found at a UNH campus parking lot. They are calling this an isolated incident and said that there is no threat to students.

UNH is making counselors available to students.

A closer look at the story:

Timeline: Lizzi Marriott death investigation

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Lizzi Marriott

UNH student Lizzi Marriott, 19, first went missing in October 2012. Her last cell phone signal was picked up at around 10:10 p.m. on Oct. 9 in Dover, where she was headed to meet up with friends.

Marriott, who was in her first semester at UNH, has been living with relatives in Chester while attending school. She is originally from Westborough, Mass.

She was last heard from at about 10 p.m. Tuesday when she sent a text message and was headed to visit friends in Dover.

Friday night, police swarmed Peirce Island in Portsmouth for what they called a recovery mission. Police were also seen at the apartment building in Dover where it is believed Marriott was headed.

Later Saturday afternoon, however, police cleared the scene at Peirce Island.

A moment of silence was observed in memory of Marriott before Saturday night's men's hockey game at UNH.

Counseling has been made available for students 24 hours per day at this phone number: 603-862-2090.

“We were greatly saddened to learn of Lizzi’s death and we extend our deepest sympathies to her family and friends,” said UNH President Mark W. Huddleston. “Lizzi was a new member of the university community and will be missed in our classrooms. Our focus now will be on supporting our campus community during this difficult time.”